date > /tmp/date.txt; firefox /tmp/date.txt yields to: ATTENTION: default value of option mesa_glthread overridden by environment. ATTENTION: default value of option mesa_glthread overridden by environment. ATTENTION: default value of option mesa_glthread overridden by environment. ATTENTION: default value of option mesa_glthread overridden by environment. Missing chrome or resource URL: resource://gre/modules/UpdateListener.jsm Missing chrome or resource URL: resource://gre/modules/UpdateListener.sys.mjs Missing chrome or resource URL: resource://gre/modules/UpdateListener.jsm Missing chrome or resource URL: resource://gre/modules/UpdateListener.sys.mjs The first 4 lines can be avoided by export MESA_DEBUG=silent Maybe worth to add this tweak to the environment by the ebuild ? But the next 4 lines will still occur and are annoying IMO. Any chance to suppress them (by another env var) ?
Hmmmm sure I think some of these could be tied behind "debug" use flag.